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Easy Java Simulations (2001- ) => Optics => Topic started by: Fu-Kwun Hwang on March 17, 2006, 09:22:18 am



Title: Intensity of reflected s-wave/p-wave
Post by: Fu-Kwun Hwang on March 17, 2006, 09:22:18 am
This applet will calculate reflected and refracted light intensity according to the incident angle for p-wave and s-wave.
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[ejsapplet]

Refraction satisfy Snell's law : $n_1 \sin\theta_1=n_2\sin\theta_2$

There are always reflected wave when light touch the boundary between two media.
The intensity for reflected wave $\vec{E}'= r_s \vec{E}_s + r_p \vec{E}_p$ where $\vec{E}_s, \vec{E}_p$ are electric field for s-wave and p-wave.
$r_s= \frac{n_1\cos\theta_1 -n_2\cos\theta_2}{n_1\cos\theta_1 +n_2\cos\theta_2} =\frac{\sin(\theta_1-\theta_2)}{\sin(\theta_1+\theta_2)}$
and
$r_p=\frac{n_2\cos\theta_1-n_1\cos\theta_2}{n_2\cos\theta_1+n_1\cos\theta_2}=\frac{\tan(\theta_1-\theta_2)}{\tan(\theta_1+\theta_2)}$
The intensity of refraction wave is the intensity of incident wave minus intensity of reflected wave.
There is no refracted wave when internal reflection occurs.
When $\theta=\theta=0$, the fraction of reflected wave is $\frac{(n_1-n_2)^2}{(n_1+n_2)^2}$.
for light from air(n=1) to glass (n=1.5), there are only $\frac{(1-1.5)^2}{(1+1.5)^2}=\frac{0.5^2}{2.5^2}=\frac{1}{25}=4%$ light being reflected.


Title: Re: Intensity of reflected s-wave/p-wave
Post by: minusquare on October 16, 2007, 12:33:43 pm
I downloaded and unzipped.But i am unable to open unzipped file.I can however view it online from your wesite.Please guide.
                                   Thanks.


Title: Re: Intensity of reflected s-wave/p-wave
Post by: Fu-Kwun Hwang on October 16, 2007, 04:37:51 pm
I just use "send to my email account" method, and open the file from my email message without any problem.
May be there is something wrong with your computer? Try to use another computer to check it again.